Are Sharp, Rough Edges Slowing Down Your ACM Sign Production?
Many sign shops and fabricators still manually trim the edges using Arbor Press of ACM signage and metal sign boards. That extra handling adds labor costs, causes inconsistent radii, and delays turnarounds for custom aluminum composite signs. Punch Tools' Corner Rounder delivers clean, burr-free rounded corners in a single stroke, giving your ACM signs a professional finish every time.
Precision Tooling Solutions for the Sign Industry
Precision Corner Rounding for ACM Signs & Signage
Demonstration: Punching clean, burr-free rounded corners on ACM sign board materials.
The Punch Tools Corner Rounder is engineered specifically for fast, high-volume production of ACM signs, architectural fascia, and custom ACM signage. Designed to process aluminum composite panels (ACPs), polycarbonate panels, and solid aluminum road signs, this tool eliminates hand-filing, deburring, and costly CNC router bottlenecking.
Whether you are fabricating standard aluminum composite sign board materials, outdoor commercial displays, or heavy-duty metal signs, our spring-loaded corner rounding units mount easily to a Porta Press, press brake, or ironworker for immediate production upgrades.
| Feature | Capability & Benefit |
|---|---|
| Material Compatibility | ACM signage panels up to 6 mm, solid aluminum road signs up to 0.125" (1/8"), polycarbonate panels |
| Operation Style | Single-stroke press cycle delivers clean, burr-free rounded corners instantly |
| Press Compatibility | Porta Press, press brake, or ironworker — low press tonnage required |
| Radius Versatility | Standard sign radii, custom profiles, and DOT highway sign specifications available |
Corner Rounder for the Sign Industry
Corner Rounder tooling configurations designed for precision corner radius finishing on metal and composite sign boards.

Common Uses for ACM Traffic Signage
ACM panels are popular in many applications because of their balanced properties. They are commonly used for:
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Work-zone signs — Easy to transport and set up on temporary sign stands.
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Facility and parking signage — A practical option for directing vehicles and pedestrians in private lots or campuses.
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Wayfinding and information signs — Smooth surface and flatness make ACM ideal for high-quality imaging.
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Short- to medium-term traffic control — Where agencies and contractors want a reliable panel with efficient handling.
Why Sign Fabricators Choose the Corner Rounder for ACM Signs
Upgrading your sign fabrication workflow with heavy-duty corner rounding tooling dramatically reduces finishing labor while improving part consistency across high-volume aluminum composite sign runs.
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Eliminate Manual Deburring — punches smooth, safe, finished corners on aluminum composite panels for the sign industry in one quick pass.
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Multi-Material Versatility — seamlessly handles aluminum composite material (ACM), polycarbonate panels, and metal signs without changing tools.
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DOT & Custom Radii — easily match standard highway department specs for solid aluminum road signs or custom architectural radii.
Frequently Asked Questions
Can this tool punch corners on standard 3mm and 6mm ACM signage?
Yes. The Corner Rounder is optimized specifically for aluminum composite sign board materials, producing sharp, clean-sheared edges without delaminating the aluminum skins or tearing the polyethylene core.
What other materials can be punched besides aluminum composite panels (ACPs)?
In addition to ACM sign materials, the tool easily processes solid aluminum road signs up to 0.125" thick, polycarbonate panels, sheet metal, and various rigid plastic sign boards.




